Line isolation monitor



FIG. 1 is a right front perspective view of a line isolation monitorshowing our new design;

FIG. 2 is a front plan view thereof;

FIG. 3 is a right side plan view thereof;

FIG. 4 is a left plan view thereof;

FIG. 5 is a back plan view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is bottom plan view thereof.

The ornamental design for a line isolation monitor, as shown. 